<template>

  <div>
    <el-form ref="loginForm"
             v-loading="loading"
             element-loading-text="正在登录..."
             element-loading-spinner="el-icon-loading"
             element-loading-background="rgba(0, 0, 0, 0.8)"
             :model="form"
             :rules="rules"
             label-width="80px"
             class="login-box">
      <h3 class="login-title">欢迎登录</h3>
      <el-form-item label= "账号" prop="username">
        <el-input type="text" placeholder="请输入账号" v-model="form.username"/>
      </el-form-item>
      <el-form-item label= "密码" prop="password">
        <el-input type="password" placeholder= "请输入密码" v-model="form.password"/>
      </el-form-item>
      <el-form-item label="验证码" prop="code">
        <el-input type="text"  v-model="form.code" placeholder="点击图片更换验证码" style="width: 170px;margin-right: 5px"></el-input>
        <img v-bind:src="verifyCodeUrl" @click="updateVerifyCode">
      </el-form-item>
      <el-form-item>
        <el-checkbox v-model="checked" class="login-Remember">记住我</el-checkbox>&nbsp;
        <el-button type="primary" v-on:click="onSubmit('loginForm')" style="width: 120px">登录</el-button>
      </el-form-item>
    </el-form>


    <!--    &lt;!&ndash;登陆验证提示框&ndash;&gt;-->
    <!--    <el-dialog title="温馨提示" :visible.sync="dialogVisible" width="30%" :before-close="handleClose">-->
    <!--      <span>请输入账号、密码和验证码！</span>-->
    <!--      <span slot="footer" class="dialog-footer">-->
    <!--    <el-button type="primary" @click="dialogVisible = false">确 定</el-button>-->
    <!--    </span>-->
    <!--    </el-dialog>-->
  </div>
</template>

<script>

export default {
  name: "UserLogin",
  data() {
    return {
      verifyCodeUrl: '/verifyCode?time='+new Date(),
      form: {
        username: '',
        password: '',
        code: ''
      },
      loading: false,
      checked: true,
      //表单验证，需要在el-form-item 元素中增加prop 属性
      rules: {
        username: [
          {required: true, message: " 账号不可为空", trigger: 'blur'}
        ],
        password: [
          {required: true, message: " 密码不可为空 ", trigger: 'blur'}
        ],
        code: [
          {required: true, message: " 验证码不可为空 ", trigger: 'blur'}
        ]
      }
      // //对话框显示和隐藏
      // dialogVisible: false
    }
  },
  methods: {
    //刷新验证码
    updateVerifyCode(){
      this.verifyCodeUrl = '/verifyCode?time='+new Date();
    },
    //点击登录按钮事件
    onSubmit(formName) {
      //为表单绑定验证功能
      this.$refs [formName].validate((valid) => {
        if (valid) {
          this.loading = true;
          //发数据给后端
          this.postRequest("/login",this.form).then(resp =>{
            this.loading = false;
            if(resp){
              //存储用户token
              const tokenStr = resp.obj.tokenHead+resp.obj.token;
              // console.log("tokenStr:"+tokenStr);
              window.sessionStorage.setItem('tokenStr',tokenStr);
              //页面跳转
              let path = this.$route.query.redirect;
              this.$router.replace((path == '/userlogin' || path == undefined) ? '/mainpage' : path);
            }else{
              this.verifyCodeUrl = '/verifyCode?time='+new Date();
            }
          })
        }else {
          this.$message.error('请输入所有字段');
          return false;
        }
      });
    }
  }
}
</script>


<style lang="scss" scoped>
.login-box {
  border: 1px solid #DCDFE6;
  width: 380px;
  margin: 180px auto;
  padding: 35px 35px 15px 35px;
  border-radius: 5px;
  -webkit-border-radius: 5px;
  -moz-border-radius: 5px;
  box-shadow: 0 0 25px #909399;
}

.login-title {
  text-align: center;
  margin: 0 auto 40px auto;
  color: #303133;
}
.login-Remember{
  text-align:left;
  margin: 0px 0px 15px 0px;
}
</style>
